The Butt Fender is the original MTB saddle guard.

This clever rear mudguard is lightweight, discreet and requires no fasteners!

  • Developed for MTB; equally suited to commuters.
  • Helps to prevent 'soggy arse syndrome'.
  • Stops the top of your seat post from getting clogged up.
  • Discreet and very effective!
  • Weighs just 30g!
  • No fasteners required! Our simple, clever design is quick to fit and secure once in place!
  • Compatible with most standard double steel rail saddles that don't have any daft plastic moulded bits in the way!
  • Easy to clean as it's flexible and opens flat. Simply wipe it and you're done.
  • Made in the UK from recyclable plastic.


It's no secret that plastic is used in most of our products, and this is simply because it's the best material for the job.

As a responsible manufacturer we are committed to sustainability; to produce and sell our products with minimal waste, minimal packaging and we recycle everything we can along the way. Each product is designed to serve it's purpose over many years and is by no means a single use plastic. When a Mucky Nutz product does eventually reach the end of it's functional life, it can be fully recycled and we encourage customers to do so!

Product Code: MN0028
Colour: Black
EAN: 5060325480098

Dimensions: 330 x 134mm
Mass: 30g

We are currently working on updating the fitting instructions across all of our products. 

In the meantime please follow the steps below. If you need assistance please get in touch!

Butt Fender fitting instructions:

    1. Lightly squeeze the fender along the crease lines to form it into shape. Make sure it stays wider than the tyre width!

    2. Slot the 'wings' through the back of the saddle rails, then reach in and pull the hanger downwards to clip onto the bottom rails. It should look like this...

    3. Square the shape up and you're good to go!

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Butt Fender, Black

  • Product Code: MN0028
  • Reward Points: 75
  • Availability: In Stock
  • £7.49

  • Ex Tax: £6.24
  • Price in reward points: 749

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